| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier with a small-sized omnidirectional built-in speaker. SOLUTION: This amplifier 10 with the built-in speaker is provided with a cabinet 12 and a speaker unit 16 is attached to the center part of a plate material 14 arranged at the intermediate part of the case body 12. An amplifier main body 18 is attached in front of the speaker unit 16, and the amplifier 10 with the built-in speaker is installed with the amplifier main body 18 positioned on a floor surface side. A space formed by the cabinet 12, the plate material 14 and the speaker unit 16 is a tightly sealed space. By vibrating the vibration body of the speaker unit 16 back and forth, respiratory vibration is excited in the cabinet 12. A gap is formed between the inner wall surface of the cabinet 12 and the amplifier main body 18, the amplifier main body 18 is cooled by the flow of air passing through the gap and the gap can be used as a load horn as well.
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